From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59987) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b7YS6-0001TN-VQ for qemu-devel@nongnu.org; Mon, 30 May 2016 21:26:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b7YS5-0002Uv-13 for qemu-devel@nongnu.org; Mon, 30 May 2016 21:26:37 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48731) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b7YS4-0002Ur-RY for qemu-devel@nongnu.org; Mon, 30 May 2016 21:26:36 -0400 From: Stefan Hajnoczi Date: Mon, 30 May 2016 18:26:04 -0700 Message-Id: <1464657966-26186-7-git-send-email-stefanha@redhat.com> In-Reply-To: <1464657966-26186-1-git-send-email-stefanha@redhat.com> References: <1464657966-26186-1-git-send-email-stefanha@redhat.com> Subject: [Qemu-devel] [PATCH v2 6/8] virtio-blk: live migrateion s->rq with multiqueue List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Roman Pen , Fam Zheng , Christian Borntraeger , Paolo Bonzini , Ming Lei , Stefan Hajnoczi Add a field for the virtqueue index when migrating the s->rq request list. The new field is only needed when num_queues > 1. Existing QEMUs are unaffected by this change and therefore virtio-blk migration stays compatible. Suggested-by: Paolo Bonzini Signed-off-by: Stefan Hajnoczi --- hw/block/virtio-blk.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 9de749b..f36b690 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -873,6 +873,11 @@ static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f) while (req) { qemu_put_sbyte(f, 1); + + if (s->conf.num_queues > 1) { + qemu_put_be32(f, virtio_queue_get_id(req->vq)); + } + qemu_put_virtqueue_element(f, &req->elem); req = req->next; } @@ -896,9 +901,22 @@ static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f, VirtIOBlock *s = VIRTIO_BLK(vdev); while (qemu_get_sbyte(f)) { + unsigned nvqs = s->conf.num_queues; + unsigned vq_idx = 0; VirtIOBlockReq *req; + + if (nvqs > 1) { + vq_idx = qemu_get_be32(f); + + if (vq_idx >= nvqs) { + error_report("Invalid virtqueue index in request list: %#x", + vq_idx); + return -EINVAL; + } + } + req = qemu_get_virtqueue_element(f, sizeof(VirtIOBlockReq)); - virtio_blk_init_request(s, s->vq, req); + virtio_blk_init_request(s, virtio_get_queue(vdev, vq_idx), req); req->next = s->rq; s->rq = req; } -- 2.5.5